IF you're gonna buy & ship ethanol based fuel, I'd recommend Ignite Racing's various ethanol options (E85/E98). Eddie Bello uses it (think he's got a sponsorship) in his Porsche, and it seems to work pretty well for him

Anyone use this before? I'm up in Canada so I don't have access to pump e85.

thanks

basically all this stuff is both VP C85 and Sonoco e85-R is e85 that is ALWAYS 85% ethanol. you WILL NOT always get 85% ethanol on pumps. it varies often. With that being said, neither state what the other 15% of the fuel is. I wish they would say "it's crap 87 of course, or, it's solid 93 oct". that's why e98 is actually best. 98% ethanol and only has 2% crap gas. I'm personally gonna try renegade fuels E112 soon. 85% ethanol and 15% 112 leaded race fuel.

Not the motors fault... Having a sub-par fueling system would affect any motor, even the S65

Um the fueling system is part of the motor so this seems pretty N54 specific to me as we are well aware of N54 fueling issues. So if the fuel doesn't have issues on other motors seems to me it is N54 specific.